Coffee maker



FIG. 1 is a perspective view of the coffee maker showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines shown in the drawings depict portions of the coffee maker that form no part of the claimed design. 

CLAIM The ornamental design for a coffee maker, as shown and described. 